Minutes after the Palace announced in a statement that the pregnant Duchess of Cambridge, 31, had checked into the Lindo Wing at St. Mary's Hospital in London, the microblogging site exploded with #KateMiddleton and #RoyalBaby tweets from all over the world. Among those who chimed in to voice their excitement were celebs including Snooki, Kelly Osbourne, Chrissy Teigen, and Piers Morgan. Us Weekly rounded up some of their reactions below:

Sarah Hyland: #BABYWATCH UPDATE! Kate Middleton has gone into labor! A royal baby is being born! I repeat! A #ROYALBABY is being born!!

(Hyland, who is currently in the U.K. filming a movie, also tweeted: "Hey Kate, it'd be great if u could pop out that #royalbaby in the next 7 hrs or so, so I could say I was here when the baby was born? Kthanksbye.")